Carbureter.



A. HOWARTH.

GARBURBTBR. APPLIOATION mun MAY31. 1901.

PatentedMay 18, 1909.

UNITED STATES PATENT osmon.

ALBERT HOWARTH, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO STANDARD OAR- BURETER COMPANY, 01 PROVIDENCE, RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

GABB'URBTEBL ing drowi Like r e fifrence numerals indicate like parts.

F'gure 1 is aside elevation of my improved earbureter. Fig. 2 is a sectional view of the some on line w w of Fig. 1. Fig. 3 is a sectional view of the same on line at .1 of Fig. 2. Fig. 4 is a sectional view of the same on line y y of Fig. 2. Fig. 5 is a sectional.

The case 2 is provided with a. flanged view of the same on line a z of Fig. 2. Fig. 6 is a plsnview of the air valve and feed nozzle, with means of operating the needle valve to supply goselene to the said nozzle, as seen on line y y of Fig. 2.

My invention relates to the class of car bureters, especiallv those ads ted for motors in automobile vehicles and or other uses, and it consists of the novel construction,

colnhinsticm and arran ement of partsas hereinafter described anclaimed.

In the drawings 1 denotes the gasolene fced chamber of the device, of usual construction, but as it forms no part of the resent invention it is not here further (l0SG1'1l1Ql..

The'cerbureter groper is inclosed in a tubular case 2, whic has its bore mode of different diameters to form what may be celled the air chamber 3, the feed chamber: 4, the

carbureting chamber 5 and the throttle- -outward longitudinally, thus carrying the valve chamber 6, as shown in Figs. 2 and 5.

opening at its 11 per end and with a pipe therefrom (not B own) to conduct the gesolene vapor to the cylinder of the engine.

A gssolene feed pipe 7 passes from the feed chamber 1 at or near the bottom thereof and. across the bottom of the carburetor, as best shown in Fig. The outer end or bore of this pipe 7 is stopped by the screw plug 8, whic .may be removed, whenever" esired, for cleaning the bore of said pipe, or for -other purposes, as may be necessary. A

nozzle 9 extends up vertically from the ipe 7 in the axial line ofthe csrbureter, the ore of the'nozzle opening into the bore of the, pipe. At the top of thenozzle 9, the bore Specification of Letters Patent.

Application filed Ray 81, 1007.

' throu Patented May 18, 1909.

Serial No. 876,818.

thereof is conieally enlarged, so as to flare outwardly, to facilitate the discharge from the nozzle. The upper end of the nozzle 9 extends up into the feed chamber 4, about hell-way.

The case 2 has the two bosses l0, and a. cap or cover 11 is secured upon the same by means of the screws 12. The case 2 also has the two bosses 13, 14, which furnish besr' 's for the shafts of the air valve and thrott e valve hereinalter described. Bearings 15 and 16 are also provided in the case 2, die.- metricelly opposite to the bearings 13, 14, respectively as seen in Fig. 2. The on or cover 11' has apertures 17 and 18 inc inement with and registering with the bearings 15 and 16, respectively. p

In the bearing 16, which is threaded, is mounted the tubular shaft 19 of a gear 20, the gear beinglast upon the shaft. This shaft 19 is screw-threaded on-its exterior surface, so as to be movable inwardly and outward in a longitudinal direction and extends t tan h the aperture 18 of the cover or cap 11, and projects slightly beyond the some at its outer end, as seen in Figs. 2 and '4.

The tubular shaft 19 also has its bore screwthreaded, as represented in Figs. 4 and 6; and a serew'threeded needle valve 21 engages therewith, so as to be longitudinally adjustable. in position in the threaded bore of the tubular shaft 19. The outer end of the needle valve 21 has the radially extendhandles 22, projecting from a head or collar 23', which is fastened u on said end of the needle valve. The she t 19 with its gear 20 rotates, and also moves inward and needle valve 21*.

A circular disk or valve 23, constitutes the adjustsble air valve, mounted in the feed chamber 4. It has a. central aperture 24,

with a radial slot or opening 25, as illustrated in 4 and 6', on it is so mounted that the u end of the nozzle 9 extends up g lt at the central aperture 24-, as seen. in Figs. 2, 4, 5 and 6. The valve disk 23 has an integral boss: 26, which has a threaded bore, and the threaded shank of the needle valve 21 passes through this boss 26, as shown most plainly in Fig. 6. Biometrically opposite to the. boss 26, the valve 23 has another boss- 27, which has a. short tuhu lsr socket to receive the cylindrical shank or 20 as shown in Fig. 4, to hold the needle valve'in its adjuste osition. By the pressure of the check nut 29 against the outer end of the tubular shaft .19 of the gear 20, the

gear 20 and the needle valve 21 are locked to ether; and the slot in the inner end of the tu ular shaft or hub 19, as already described, enables the air valve 23 to turn in unison with the needle valve 21. When the check nut 29 is loosened by turning of the handles 30 thereof, the needle valve 21 can be moved inde endentl along its threads, through the ore of t e tubular shaft 19, either inwardl or outwardly, so as to cause the inner end 0 the needle valve to project to any desirable extent into the bore of the nozzle 9. When the needle valve has been thus longi tudinally adjusted, it is held in such adjusted position by tightening up the check nut 29, and is then rotatable by and in unison with the shaft 19, when the latter is turned.

As seen in Fig. 2, the inner end of the tubular shaft 19 is bifurcated or slotted longitudinally for a short distance, and so receives loosely the adjacent part of the valve disk 23 in such manner that the turning of the exteriorly-threaded shaft 19 causes the turning of said valve disk with it, the slot in the end of said shaft 19 bein sufliciently wide to allow said end of the s aft to slide along the valve disk 23, without im airing its loose engagement with said valve isk for rotational purposes. Thus, as the needle valve 21 is inv screw-threaded engagement with the tubular shaft 19 of the gear 20 and with the threaded boss of the air valve 23, both the needle valve 21 and the air valve 23 are rotatable simultaneously by 0 erating the handles 22, because, when the c eck nut 29 is tightened up, the needle valve 21 and tubular shaft 19 are locked together, and. are then rotatable simultaneously, to the extent .of a quarter-turn, by means of the handle 22. As shown in Fig. 5, the air valve 23 on its upwardly opening edge has a double bevel or V-sha e, so t at it merel touches the inner an ace of the feed cham er in a single circumferential line, when closed to' the position shown in Fig. 2. This feature, however, is reserved as subject matter of another ap lication for Letters Patent.

he throttle valve is designated as 31 in the drawings. It has on 'each face a diametrical boss 32., through which the spindle or shaft 33 of said valve passes. A screw 34 fastens the valve 31 on the shaft 33. The shaft 33 is rotatably mounted in a bore in the boss 14 and in the aperture 15 of the case 2. The throttle valve 31 is a disk, slightly elliptical in sha e. As the bore of the chamber 5, in whic the throttle valve 31 is rotatably mounted, is circular, the ellipticity of said valve causes the valve to stand diagonally, when closed, as indicated by the dotted lines in Fig. 5. On account 0 this diagonal seating of the throttle valve 31, when closed, the two opening edges are slightly beveled, as shown in Fig. 5, to enable said edges to come into" contact, when closing, with the ortions of the tubular bore of chamber 5. n the portions of the edges of the valve disk 31 contiguous to the pivoting thereof the disk 31 has straight edges, as illustrated in Fig. 2. The bevels .on the two opening edges of the valve disk 31 are oppositely directed, as shown in Fig. 5, to allow contact with the inner tubular surface of the chamber 5 in closing. 1 he degree of such diagonal direction is preferably about 10 more than a right angle, as illustrated in Fig. 5, but any other degree may be used as desired. This feature of beveling the edge of the throttle valve is, however, reserved as subject matter for another application for Letters Patent. A gear 35 is mounted fast on the shaft 33. An idler or intermediate gear is mounted loosely on a screw 37 and meshes with the gears 20 and 35.

A stop pin 38 projects from outer side of the ea or cover 11. A lever arm 39 is securec upon the outer end of the shaft 33 by means of a close U-shaped end, which e111- braces the same and is pinched into locking engagement therewith by means of the screw 40. The shaft '33 is enlarged in the part 41 thereof as shown in Fig. 2 to furnish a circumferential shoulder against which the gear 35 abuts. The lever 39 is mounted on the enlarged portion 41 of the shaft and carries a sector-shaped plate 42, and said plate 42 has at its ends the lips 43 and 44, respectively. A screw 45 passes through the lip 43 and its inner end is adapted to abut the stop pin 38, when the parts are in the position shown in Fig. 2. A link bar or rod -16 is loosely mounted on the lever-arm 39 by a pivot 47, and connects with a throttle control lever (not shown) in the vehicle.

At the bottom of the case 2 is an annular flange 48, having an interior screw-thread, to which is secured an elbow 49. A flap valve 50 is mounted on a pivot 51, which is held in lugs 52.

The operation of my im roved carbureter is as follows. The gaso ene in the feed chamber 1 passes through the feed pipe 7 and rises in the bore of the nozzle 9 nearly 'reter is not in operation, the air valve 23 is in the position sh own in Fi 2 and 4. time the lever arm 39, ink bar 46 and the connected parts'arc in the position shown in Figs. -1 and 2. When the air valve 23 is thus closed, the inner end of the needle valve 21 extends into and nearly closes transverse! the bore of the nozzle 9, as illustrate in Figs. 4 and 6. This needle valve enters t'hc'nozzle bore at a point above the normal leyel of the gasolene therein. The

chauffeur moves the throttle control lever and draws the link bar 46 in the direction indicated by the arrow 53, thereby operating the lever arm 39 which turns the throttle causes a movement of the gear 20. As these gears 35, 36- a'nd 20 are of the same diameter and have the same number of teeth, they all revolve in equal times and to the same de-' gree, and the gears 35 and 20 rotate in the same direction. The above described movement of the link bar 46 and lever arm 39 results in the turning of the air valve 23, as in dicated by the arrow in Fig. 5. The gear 20 is thus rotated to the same degree and extent that the gear 35 is. The gear 20 turns with it its own tubular shaft 19. The

needle valve 21, which has been set in the tubularshaft to the desired adjusted osi- .tion, is locked in such position by the c ieck nut 29, and consequently rotates with the tubular shaft 19 and gear 20. As 'the air valve 23 is in loose engagement with the slot in the inner end of the tubular shaft 19, said valve turns in unison with said shaft and to the same me. This movement of the gear 2-0, tubu ar she-ft 19, needle valve 21 and air valve 23 cannot, xlziowevesr, exceed 90, as

illustrated in Fig. 5, where the vertical or open figsition of the air valve 23 is shown insolid as and horizontal or closed 1 ositien of said valve .jB'BhOWII in dotted mes. The separatefmoveqmeirt of the needle valve 21, which is caused, by manipulating the hendles 22,-.is .for the purpose of ad ustment, only, and determinesthe extent to which the inner end ofthe needleivelve 21 extends into the bore of the nozzle 9. A-quarter clockwise turn of the sleeve or bear-h1g1!) of the gear 20 results'in the unscrewing of the nee-' le valve21 -to'an extent not exceeding 90 andsotheimier end of. theneedle valve 21 is slightly withd ray/n and opens up a somewhat larger orifice in the bore of the nozzle 9, thus yellowing a greater flow of the gesolene' 6 through it when ever the suction in the chem- At this f the air admission is reg bet 5 causes an overflow of the gasolene from the nozzle 9, as presently ex lained. Of course, the reverse movement 0 the link bar 46 and lover arm 39 results in a reverse movement of the air valve 23 and needle valve 21 so that the needle valve 21 again enters more full into the bore of the nozzle and cuts off t 0 flow of gasolene from the feed chamber 1 and pipe 7, as alread described. In order to adjust the needle va ve 21, however, it is necessary to loosen the check nut 29 slightly, and then the needle valve can be separately moved, either inwerdl or outwardly, as may be needed, to get t e lproper adjustment of the needle valve and t on by" screwing up the check nut 29, t iose arts are locked together, as before, for simu timeous operation, as already explained. It is thus seen that, whenever the air valve 23 is opened to any extent, the needle valve 21 is withdrawn to. a proportionate extent from its closure of the nozzle bore, and vice versa, and at the sametime the throttle valve 31 is turned to the same extent and inthe same direction.

The flap valve 50, being permanently opened durin g the operation of the machine, a lows air to pass from the external atmosphere to the air chamber 3. Therefore, in starting the carburetor to sup ly gasolene to the engine, the one throw of t e lever arm 39 accomplishes the following results. The throttle valve 31 is opened to or toward the position shown in Fig. 5, and the piston of the engine c linder be ins to causeasuction in the chem ers 5 ant 3. T he gasolene is sucked u out of the opcnin of the bore of the nozz e 9, and the air vs vs 23 is simultaneously opened. 1 The gasolene is, thus vaporized in the carbureting chamber 5 in the usual and well knovn manner, so that the air, passing throu h the carburetor. is heavi y charged wit gasolene vapor, which vapor is conducted to the engine cylinder for explosion. A reverse movement of the lever arm 39 closes to the same degree both the valves 31 and 23 and diminishes the discharge of the gasolene from the noz zle 9. The extent of the movements of the lever arm 39 is limited by the contact of the screw 45 with the stop pin 38 in one direction and with the contact of the lip 44 with the stop pin 38 in the op osite directron. The screw 45 is adjusts to any desired degree.

It is evident that the construction above specified and shown in the drawings allowsa great range of difierent adjustments, and to provide t ese is one of the objects of this inventien.

. The relation of the glesolene discharge to u ated by the adjusted position of the needle valve 21 m the tubular shalt 19 and boss 26 of the air valve 2'3. This adjustment is efleetedby loosening the for w check nut 29, by manipulatin of its handles or spokes 30. Then the needle valve 21 may be moved farther into or out of the bore of the nozzle 9 to the extent desired, and is locked in said position by tightening up the check nut 29 again. In this way, the opening of the air valve 23 may be timed so that a certain desired quantity of air or degree of air movement may-be provided before there is any discharge whatever of the gasolene from the nozzle 9 into the feed chamber 4; or it may be rovided that the needle valve 21 shall stan open to a certain desired extent, as illustrated in Fi s. 4 and 6, even while the air valve 23 is entirely closed. Any desired relation of the air supply and the gasolene su ly to the feed chamber 4 can thus be esta b ished and maintained.

The aperture 24 in the disk of the air valve 23 allows the disk to. assume the horizontal position seen in Fi s. 2, 4 and 6, while the radial slot 25 therein allows the vertical position of the disk seen in Fig. 5. The relation of the throttle valve 31 to the air valve 23 can be regulated, adjusted and maintained by removing the idler or intermediate gear 36, and then turning by hand the gear 20 backward or forward, one tooth or more, and reengaging the idler or intermediate gear 36 with the gears 35 and 20. In this way, the gear 23 can be set forward or backward,- and so the timing of the operation of the valves 31 and 23 in relation to each other can be accurately adjusted and determined. If

there is too much suction caused in the cham-' her 5 by the in-stroke of the piston of the engine, there is an excess of gasolene sucked out of the nozzle 9 and too little air supplied through the air valve 23 to properly or suiticientl vaporize said discharged gasolene,

liich purpose I rovide for an adjustment of the needle vave to re ulate exactly the flow of the asolene into t e chamber 4 for any set position of the valves 23 and 31. In all these defective ;or unsatisfactor conditions, the adjustability just descri ed of the gears 35, 36 and 20 in relation to each other and of the needle valve 21 remedies the difliculty and insures the proper proportion of air and gasolene either as to the quantity and quality of the mixture. In order to effect said adjustment of the gears 35, 36 and 20, the cap or cover 11 is made detachable, and when removed from osition gives access to said train of gears. he flap .valve 50, when closed, allows a small ingress of atmospheric air to the carburetor, throu h the openings 56 in said valve, but when t e engine is operating, the valve 50 is lowered to open the outer end of the elbow 49 to the full extent for the admission of air, and the air current flowing into the chambers 4 and 5 is regulated by means of the air valve 23, as described. By rovidin the arm 39 with a plurality of he as for t e insertion of the it by means I screw or bolt 47, the leverage on said arm by l the action of the rod or link bar 46 can be adjusted. It is evident that instead of using a train of gears to operate the valves 23 and 31 simultaneoulsy I may use levers and link bars, or other mechanical equivalents.

I claim as a novel and useful invention and desire to secure by Letters Patent:-

1. In a carburetor, the combination of a case, an air valve having two diametrically opposite tap ed bosses and also a central aperture an a radial slot extending from said a erture, a gasolene feed pipe, a nozzle exten ing vertically from and opening at its base into said pipe, which nozzle extends up through said aperture and slot of the air valve, a pivot passing through the case and entering the air valve in one of the tapped bosses thereof, a needle valve passin through the case and through the other 0 the tapped bosses of the air valve and into the nozzle bore at a right angle thereto so as to be capable of opening or closing the nozzle bore and a handle on the outer end of the needie valve.

2. In a carbureter, the combination of a case, an air valve pivotally mounted in the case and having a radiall directed slot, a gasolene feed pi e, a nozz e extending from the pipe throug the slot of the air valve, and a needle valve passing through the air valve in a radial direction and entering throu h the nozzle at a right an le thereto into fire nozzle bore substantially as and for the purpose specified.

3. In a carbureter, the combination of a tubular case, a circular air valve adapted to fit in said case and rovided with a central aperture and a radia slot, two diametrically arranged bosses one having a smooth bore tapped therein and one aving a screwthreaded bore tapped therethrough, a gasolene feed ipe, a nozzle extending from the pipe up t rough the radial slot of the air va ve and having a radial bore through one side 0 ening into the nozzle bore, a needle valve aving a screw-threaded shank passin through the last named boss of the air va ve and having its inner end su ported in the radial bore of the nozzle w erein the needle valve is longitudinally movable to open or close the nozzle bore a ear having a tubular shaft which is screw-t readed on its outer and inner surfaces, by which shaft extending through the case said gear is mounted, a handle on the outer end of the needle valve, and meansfor rotating said gear, said threaded shank of the needle valve be' enga ed with and movable in the bore iii he tu ular shaft of the gear.

tubular case, a circular air valve adapted to a y arranged bosses having bores tapped 4. In a carburetor, the combination of a fit invsaid case and provided with a central a erture and a radial slot, two diametric-v therein, a gasolene feed pipe, a nozzle extending from the pipe up'through the radial slot of the air valve and having a radial here through one side 0 inning into the nozzle bore, a needle valve having a screw-threatled shank passing through the last named boss of the air valve and having its inner end suported in the radial bore ol the nozzle Wherein the needle valve is longitudinally movable to open or close the nozzle bore, a gear having a tubular shaft which is screw-threaded on its outer and inner surfaces, by which shaft extending through the case said gear is mounted, means for rotating said gear, a

handle on the outer end of the needle valve, and a check nut mounted on the screwtl'ireaded shank of the needle valve and adapted to hold the needle valve in an adjusted position.

5. In a carburetor, the combination of a case, an air valve mounted rotatably in the case, diametrically arranged pivots on which the air valve is rotatable, one of said pivots having a central longitudinal screw-threaded bore, a screw-threaded needle valveextending throu h the case at one side and passing through t e said tubular pivot, a gasolene.

discha in nozzle havin a radial bore into which t e inner end of t 1e needle valve extends, and means for rotating the air valve and needle valve simultaneously and to the same degree. a

6. In a carburetor, the combination-of a case, an air valve mounted rotatably in the case, diametrically arranged pivots on which the air valve is rotatable, one of said pivots having a central longitudinal bore, a needle valve extending through the case at one side and passing through the tubular pivot, a gasolene nozzle havin a bore entermg side- Wise into the bore of 516 nozzle and in which the inner end of the needle valve extends inovabl means for regulatin the extent to which t e needle valve enters t e nozzle bore and means for rotating the needle valve and air valve simultaneousl to the same degree.

7. In' a carburetor, t e combination of a tubular case, a rotatable tube mounted in said case and having an exterior and an interior screw thread and a central longitudinal slot or bifurcation at its inner end, a valve disk rotatable in said case and extending loosely at one portion of its edge into said slot or bifurcation of the tube, a pivot extending loosely into a socket in the edge of the valve disk diametrically opposite to said engaging tube, means for rotating said tube, a gasolene feed device comprising a nozzle, and a needle valve mounted in said tube and entering said nozzle.

8. In a new article of manufacture, a combined air valve and needle valve for carbureters, consisting of a circular disk havin a central radial aperture and two d'iametrica ly opposite bosses with bores therein, a tube having a screw-threaded bore and adapted to engage with the valve disk at one end of said tube, a needle valve havin a screwthreaded shank engageable with t e bore of said tube and having its inner end extending through one of the bosses of the valve disk to serve as a pivot and also projecting into the central aperture of the valve disk, a handle on the outer end of the needle valve, and means for rotating the tube, air valve and needle valve in unison.

9. In a carburetor, in combination, a throttle valve means for mechanically diminishing the transverse area of the air supply passage at the gasoleneorifice automatically and positively, as the throttle valve is closed; means for changing the area of the air supply passage at the gasolene orifice at any given position of the throttle valve; means for mechanically diminishing the flow of gasolene automatically and positively as the throttle valve is closed; and means for changing the flow of gasolene at any given position of the throttle valve.

In testimony whereof Iaflix my signature in presence of two witnesses.

ALBERT HoWaR'rn.

Witnesses:

WILLIAM E. PREW, HOWARD A. LAMPREY. 

